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Periodic Trend: Ionic Radius

10. Periodic Properties of the Elements / Periodic Trend: Ionic Radius / Problem 5

Arrange this isoelectronic series in order of increasing atomic radius: Se^2-, Sr²⁺, Rb⁺, Br^-.

A

Rb⁺< Br^- < Se^2-< Sr²⁺

B

Se^2-< Sr²⁺< Rb⁺< Br^-

C

Sr²⁺< Rb⁺< Br^-< Se^2-

D

Se^2-< Rb⁺< Br^-< Sr²⁺

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